Francey, ?Notizbl. Bot. Gart. Berlin-Dahlem 11: 880. 1933?, 1933.

(U. E. )& Francey and Francey, ?Notizbl. Bot. Gart. Berlin-Dahlem 11: 882. 1933?, 1933.

Francey, ?Notizbl. Bot. Gart. Berlin-Dahlem 11: 881. 1933?, 1933.